C++ Com_Memset函数代码示例

/*
=================
R_CreateSurfaceGridMesh
=================
*/
static srfGridMesh_t *R_CreateSurfaceGridMesh( int width, int height,
    srfVert_t ctrl[ MAX_GRID_SIZE ][ MAX_GRID_SIZE ],
    float errorTable[ 2 ][ MAX_GRID_SIZE ],
    int numTriangles, srfTriangle_t triangles[ SHADER_MAX_TRIANGLES ] )
{
	int           i, j, size;
	srfVert_t     *vert;
	vec3_t        tmpVec;
	srfGridMesh_t *grid;

	// copy the results out to a grid
	size = sizeof( *grid );

	if ( r_stitchCurves->integer )
	{
		grid = (srfGridMesh_t*)/*ri.Hunk_Alloc */ Com_Allocate( size );
		Com_Memset( grid, 0, size );

		grid->widthLodError = (float*)/*ri.Hunk_Alloc */ Com_Allocate( width * 4 );
		Com_Memcpy( grid->widthLodError, errorTable[ 0 ], width * 4 );

		grid->heightLodError = (float*)/*ri.Hunk_Alloc */ Com_Allocate( height * 4 );
		Com_Memcpy( grid->heightLodError, errorTable[ 1 ], height * 4 );

		grid->numTriangles = numTriangles;
		grid->triangles = (srfTriangle_t*) Com_Allocate( grid->numTriangles * sizeof( srfTriangle_t ) );
		Com_Memcpy( grid->triangles, triangles, numTriangles * sizeof( srfTriangle_t ) );

		grid->numVerts = ( width * height );
		grid->verts = (srfVert_t*) Com_Allocate( grid->numVerts * sizeof( srfVert_t ) );
	}
	else
	{
		grid = (srfGridMesh_t*) ri.Hunk_Alloc( size, ha_pref::h_low );
		Com_Memset( grid, 0, size );

		grid->widthLodError = (float*) ri.Hunk_Alloc( width * 4, ha_pref::h_low );
		Com_Memcpy( grid->widthLodError, errorTable[ 0 ], width * 4 );

		grid->heightLodError = (float*) ri.Hunk_Alloc( height * 4, ha_pref::h_low );
		Com_Memcpy( grid->heightLodError, errorTable[ 1 ], height * 4 );

		grid->numTriangles = numTriangles;
		grid->triangles = (srfTriangle_t*) ri.Hunk_Alloc( grid->numTriangles * sizeof( srfTriangle_t ), ha_pref::h_low );
		Com_Memcpy( grid->triangles, triangles, numTriangles * sizeof( srfTriangle_t ) );

		grid->numVerts = ( width * height );
		grid->verts = (srfVert_t*) ri.Hunk_Alloc( grid->numVerts * sizeof( srfVert_t ), ha_pref::h_low );
	}

	grid->width = width;
	grid->height = height;
	grid->surfaceType = surfaceType_t::SF_GRID;
	ClearBounds( grid->bounds[ 0 ], grid->bounds[ 1 ] );

	for ( i = 0; i < width; i++ )
	{
		for ( j = 0; j < height; j++ )
		{
			vert = &grid->verts[ j * width + i ];
			*vert = ctrl[ j ][ i ];
			AddPointToBounds( vert->xyz, grid->bounds[ 0 ], grid->bounds[ 1 ] );
		}
	}

	// compute local origin and bounds
	VectorAdd( grid->bounds[ 0 ], grid->bounds[ 1 ], grid->origin );
	VectorScale( grid->origin, 0.5f, grid->origin );
	VectorSubtract( grid->bounds[ 0 ], grid->origin, tmpVec );
	grid->radius = VectorLength( tmpVec );

	VectorCopy( grid->origin, grid->lodOrigin );
	grid->lodRadius = grid->radius;
	//
	return grid;
}

/*
=================
RB_ShadowTessEnd

triangleFromEdge[ v1 ][ v2 ]


  set triangle from edge( v1, v2, tri )
  if ( facing[ triangleFromEdge[ v1 ][ v2 ] ] && !facing[ triangleFromEdge[ v2 ][ v1 ] ) {
  }
=================
*/
void RB_ShadowTessEnd( void ) {
	int		i;
	int		numTris;
	vec3_t	lightDir;
	GLboolean rgba[4];

	// we can only do this if we have enough space in the vertex buffers
	if ( tess.numVertexes >= SHADER_MAX_VERTEXES / 2 ) {
		return;
	}

	if ( glConfig.stencilBits < 4 ) {
		return;
	}

	VectorCopy( backEnd.currentEntity->lightDir, lightDir );

	// project vertexes away from light direction
	for ( i = 0 ; i < tess.numVertexes ; i++ ) {
		VectorMA( tess.xyz[i], -512, lightDir, tess.xyz[i+tess.numVertexes] );
	}

	// decide which triangles face the light
	Com_Memset( numEdgeDefs, 0, 4 * tess.numVertexes );

	numTris = tess.numIndexes / 3;
	for ( i = 0 ; i < numTris ; i++ ) {
		int		i1, i2, i3;
		vec3_t	d1, d2, normal;
		float	*v1, *v2, *v3;
		float	d;

		i1 = tess.indexes[ i*3 + 0 ];
		i2 = tess.indexes[ i*3 + 1 ];
		i3 = tess.indexes[ i*3 + 2 ];

		v1 = tess.xyz[ i1 ];
		v2 = tess.xyz[ i2 ];
		v3 = tess.xyz[ i3 ];

		VectorSubtract( v2, v1, d1 );
		VectorSubtract( v3, v1, d2 );
		CrossProduct( d1, d2, normal );

		d = DotProduct( normal, lightDir );
		if ( d > 0 ) {
			facing[ i ] = 1;
		} else {
			facing[ i ] = 0;
		}

		// create the edges
		R_AddEdgeDef( i1, i2, facing[ i ] );
		R_AddEdgeDef( i2, i3, facing[ i ] );
		R_AddEdgeDef( i3, i1, facing[ i ] );
	}

	// draw the silhouette edges

	GL_Bind( tr.whiteImage );
	qglEnable( GL_CULL_FACE );
	GL_State( GLS_SRCBLEND_ONE | GLS_DSTBLEND_ZERO );
	qglColor3f( 0.2f, 0.2f, 0.2f );

	// don't write to the color buffer
	qglGetBooleanv(GL_COLOR_WRITEMASK, rgba);
	qglColorMask( GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE );

	qglEnable( GL_STENCIL_TEST );
	qglStencilFunc( GL_ALWAYS, 1, 255 );

	// mirrors have the culling order reversed
	if ( backEnd.viewParms.isMirror ) {
		qglCullFace( GL_FRONT );
		qglStencilOp( GL_KEEP, GL_KEEP, GL_INCR );

		R_RenderShadowEdges();

		qglCullFace( GL_BACK );
		qglStencilOp( GL_KEEP, GL_KEEP, GL_DECR );

		R_RenderShadowEdges();
	} else {
		qglCullFace( GL_BACK );
		qglStencilOp( GL_KEEP, GL_KEEP, GL_INCR );

		R_RenderShadowEdges();

//.........这里部分代码省略.........

/*
===================
CL_WritePacket

Create and send the command packet to the server
Including both the reliable commands and the usercmds

During normal gameplay, a client packet will contain something like:

4	sequence number
2	qport
4	serverid
4	acknowledged sequence number
4	clc.serverCommandSequence
<optional reliable commands>
1	clc_move or clc_moveNoDelta
1	command count
<count * usercmds>

===================
*/
void CL_WritePacket( void ) {
	msg_t		buf;
	byte		data[MAX_MSGLEN];
	int			i, j;
	usercmd_t	*cmd, *oldcmd;
	usercmd_t	nullcmd;
	int			packetNum;
	int			oldPacketNum;
	int			count, key;

	// don't send anything if playing back a demo
	if ( clc.demoplaying || clc.state == CA_CINEMATIC ) {
		return;
	}

	Com_Memset( &nullcmd, 0, sizeof(nullcmd) );
	oldcmd = &nullcmd;

	MSG_Init( &buf, data, sizeof(data) );

	MSG_Bitstream( &buf );
	// write the current serverId so the server
	// can tell if this is from the current gameState
	MSG_WriteLong( &buf, cl.serverId );

	// write the last message we received, which can
	// be used for delta compression, and is also used
	// to tell if we dropped a gamestate
	MSG_WriteLong( &buf, clc.serverMessageSequence );

	// write the last reliable message we received
	MSG_WriteLong( &buf, clc.serverCommandSequence );

	// write any unacknowledged clientCommands
	for ( i = clc.reliableAcknowledge + 1 ; i <= clc.reliableSequence ; i++ ) {
		MSG_WriteByte( &buf, clc_clientCommand );
		MSG_WriteLong( &buf, i );
		MSG_WriteString( &buf, clc.reliableCommands[ i & (MAX_RELIABLE_COMMANDS-1) ] );
	}

	// we want to send all the usercmds that were generated in the last
	// few packet, so even if a couple packets are dropped in a row,
	// all the cmds will make it to the server
	if ( cl_packetdup->integer < 0 ) {
		Cvar_Set( "cl_packetdup", "0" );
	} else if ( cl_packetdup->integer > 5 ) {
		Cvar_Set( "cl_packetdup", "5" );
	}
	oldPacketNum = (clc.netchan.outgoingSequence - 1 - cl_packetdup->integer) & PACKET_MASK;
	count = cl.cmdNumber - cl.outPackets[ oldPacketNum ].p_cmdNumber;
	if ( count > MAX_PACKET_USERCMDS ) {
		count = MAX_PACKET_USERCMDS;
		Com_Printf("MAX_PACKET_USERCMDS\n");
	}

#ifdef USE_VOIP
	if (clc.voipOutgoingDataSize > 0)
	{
		if((clc.voipFlags & VOIP_SPATIAL) || Com_IsVoipTarget(clc.voipTargets, sizeof(clc.voipTargets), -1))
		{
			MSG_WriteByte (&buf, clc_voipOpus);
			MSG_WriteByte (&buf, clc.voipOutgoingGeneration);
			MSG_WriteLong (&buf, clc.voipOutgoingSequence);
			MSG_WriteByte (&buf, clc.voipOutgoingDataFrames);
			MSG_WriteData (&buf, clc.voipTargets, sizeof(clc.voipTargets));
			MSG_WriteByte(&buf, clc.voipFlags);
			MSG_WriteShort (&buf, clc.voipOutgoingDataSize);
			MSG_WriteData (&buf, clc.voipOutgoingData, clc.voipOutgoingDataSize);

			// If we're recording a demo, we have to fake a server packet with
			//  this VoIP data so it gets to disk; the server doesn't send it
			//  back to us, and we might as well eliminate concerns about dropped
			//  and misordered packets here.
			if(clc.demorecording && !clc.demowaiting)
			{
				const int voipSize = clc.voipOutgoingDataSize;
				msg_t fakemsg;
				byte fakedata[MAX_MSGLEN];
				MSG_Init (&fakemsg, fakedata, sizeof (fakedata));
//.........这里部分代码省略.........

static void DrawSkyBox( shader_t *shader )
{
	int		i;

	sky_min = 0;
	sky_max = 1;

	Com_Memset( s_skyTexCoords, 0, sizeof( s_skyTexCoords ) );

	for (i=0 ; i<6 ; i++)
	{
		int sky_mins_subd[2], sky_maxs_subd[2];
		int s, t;

		sky_mins[0][i] = floor( sky_mins[0][i] * HALF_SKY_SUBDIVISIONS ) / HALF_SKY_SUBDIVISIONS;
		sky_mins[1][i] = floor( sky_mins[1][i] * HALF_SKY_SUBDIVISIONS ) / HALF_SKY_SUBDIVISIONS;
		sky_maxs[0][i] = ceil( sky_maxs[0][i] * HALF_SKY_SUBDIVISIONS ) / HALF_SKY_SUBDIVISIONS;
		sky_maxs[1][i] = ceil( sky_maxs[1][i] * HALF_SKY_SUBDIVISIONS ) / HALF_SKY_SUBDIVISIONS;

		if ( ( sky_mins[0][i] >= sky_maxs[0][i] ) ||
			 ( sky_mins[1][i] >= sky_maxs[1][i] ) )
		{
			continue;
		}

		sky_mins_subd[0] = sky_mins[0][i] * HALF_SKY_SUBDIVISIONS;
		sky_mins_subd[1] = sky_mins[1][i] * HALF_SKY_SUBDIVISIONS;
		sky_maxs_subd[0] = sky_maxs[0][i] * HALF_SKY_SUBDIVISIONS;
		sky_maxs_subd[1] = sky_maxs[1][i] * HALF_SKY_SUBDIVISIONS;

		if ( sky_mins_subd[0] < -HALF_SKY_SUBDIVISIONS ) 
			sky_mins_subd[0] = -HALF_SKY_SUBDIVISIONS;
		else if ( sky_mins_subd[0] > HALF_SKY_SUBDIVISIONS ) 
			sky_mins_subd[0] = HALF_SKY_SUBDIVISIONS;
		if ( sky_mins_subd[1] < -HALF_SKY_SUBDIVISIONS )
			sky_mins_subd[1] = -HALF_SKY_SUBDIVISIONS;
		else if ( sky_mins_subd[1] > HALF_SKY_SUBDIVISIONS ) 
			sky_mins_subd[1] = HALF_SKY_SUBDIVISIONS;

		if ( sky_maxs_subd[0] < -HALF_SKY_SUBDIVISIONS ) 
			sky_maxs_subd[0] = -HALF_SKY_SUBDIVISIONS;
		else if ( sky_maxs_subd[0] > HALF_SKY_SUBDIVISIONS ) 
			sky_maxs_subd[0] = HALF_SKY_SUBDIVISIONS;
		if ( sky_maxs_subd[1] < -HALF_SKY_SUBDIVISIONS ) 
			sky_maxs_subd[1] = -HALF_SKY_SUBDIVISIONS;
		else if ( sky_maxs_subd[1] > HALF_SKY_SUBDIVISIONS ) 
			sky_maxs_subd[1] = HALF_SKY_SUBDIVISIONS;

		//
		// iterate through the subdivisions
		//
		for ( t = sky_mins_subd[1]+HALF_SKY_SUBDIVISIONS; t <= sky_maxs_subd[1]+HALF_SKY_SUBDIVISIONS; t++ )
		{
			for ( s = sky_mins_subd[0]+HALF_SKY_SUBDIVISIONS; s <= sky_maxs_subd[0]+HALF_SKY_SUBDIVISIONS; s++ )
			{
				MakeSkyVec( ( s - HALF_SKY_SUBDIVISIONS ) / ( float ) HALF_SKY_SUBDIVISIONS, 
							( t - HALF_SKY_SUBDIVISIONS ) / ( float ) HALF_SKY_SUBDIVISIONS, 
							i, 
							s_skyTexCoords[t][s], 
							s_skyPoints[t][s] );
			}
		}

		DrawSkySide( shader->sky.outerbox[i],
			         sky_mins_subd,
					 sky_maxs_subd );
	}

}

//.........这里部分代码省略.........
		return 0;
	case CG_GETGAMESTATE:
		CL_GetGameState( VMA(1) );
		return 0;
	case CG_GETCURRENTSNAPSHOTNUMBER:
		CL_GetCurrentSnapshotNumber( VMA(1), VMA(2) );
		return 0;
	case CG_GETSNAPSHOT:
		return CL_GetSnapshot( args[1], VMA(2) );
	case CG_GETSERVERCOMMAND:
		return CL_GetServerCommand( args[1] );
	case CG_GETCURRENTCMDNUMBER:
		return CL_GetCurrentCmdNumber();
	case CG_GETUSERCMD:
		return CL_GetUserCmd( args[1], VMA(2) );
	case CG_SETUSERCMDVALUE:
		CL_SetUserCmdValue( args[1], VMF(2) );
		return 0;
	case CG_MEMORY_REMAINING:
		return Hunk_MemoryRemaining();
  case CG_KEY_ISDOWN:
		return Key_IsDown( args[1] );
  case CG_KEY_GETCATCHER:
		return Key_GetCatcher();
  case CG_KEY_SETCATCHER:
		Key_SetCatcher( args[1] );
    return 0;
  case CG_KEY_GETKEY:
		return Key_GetKey( VMA(1) );



	case CG_MEMSET:
		Com_Memset( VMA(1), args[2], args[3] );
		return 0;
	case CG_MEMCPY:
		Com_Memcpy( VMA(1), VMA(2), args[3] );
		return 0;
	case CG_STRNCPY:
		strncpy( VMA(1), VMA(2), args[3] );
		return args[1];
	case CG_SIN:
		return FloatAsInt( sin( VMF(1) ) );
	case CG_COS:
		return FloatAsInt( cos( VMF(1) ) );
	case CG_ATAN2:
		return FloatAsInt( atan2( VMF(1), VMF(2) ) );
	case CG_SQRT:
		return FloatAsInt( sqrt( VMF(1) ) );
	case CG_FLOOR:
		return FloatAsInt( floor( VMF(1) ) );
	case CG_CEIL:
		return FloatAsInt( ceil( VMF(1) ) );
	case CG_ACOS:	return FloatAsInt( Q_acos( VMF(1) ) );
	case CG_FMOD:	return FloatAsInt( fmod( VMF(1),VMF(2) ) );
	case CG_POW:	return FloatAsInt( pow( VMF(1),VMF(2) ) );
	case CG_ATAN:	return FloatAsInt( atan( VMF(1) ) );
	case CG_TAN:	return FloatAsInt( tan( VMF(1)) );

	case CG_PC_ADD_GLOBAL_DEFINE:
		return botlib_export->PC_AddGlobalDefine( VMA(1) );
	case CG_PC_LOAD_SOURCE:
		return botlib_export->PC_LoadSourceHandle( VMA(1) );
	case CG_PC_FREE_SOURCE:
		return botlib_export->PC_FreeSourceHandle( args[1] );
	case CG_PC_READ_TOKEN:

static void CL_ParseGamestate( msg_t *msg )
{
	int				i;
	entityState_t	*es;
	int				newnum;
	entityState_t	nullstate;
	int				cmd;
	char			*s;

	Con_Close();

	clc.connectPacketCount = 0;

	// wipe local client state
	CL_ClearState();

	// a gamestate always marks a server command sequence
	clc.serverCommandSequence = MSG_ReadLong( msg );

	// parse all the configstrings and baselines
	cl.gameState.dataCount = 1;	// leave a 0 at the beginning for uninitialized configstrings
	while ( 1 ) {
		cmd = MSG_ReadByte( msg );

		if ( cmd == svc_EOF ) {
			break;
		}

		if ( cmd == svc_configstring ) {
			int		len;

			i = MSG_ReadShort( msg );
			if ( i < 0 || i >= MAX_CONFIGSTRINGS ) {
				Com_Error( ERR_DROP, "configstring > MAX_CONFIGSTRINGS" );
			}
			s = MSG_ReadBigString( msg );
			len = strlen( s );

			if ( len + 1 + cl.gameState.dataCount > MAX_GAMESTATE_CHARS ) {
				Com_Error( ERR_DROP, "MAX_GAMESTATE_CHARS exceeded" );
			}

			// append it to the gameState string buffer
			cl.gameState.stringOffsets[ i ] = cl.gameState.dataCount;
			Com_Memcpy( cl.gameState.stringData + cl.gameState.dataCount, s, len + 1 );
			cl.gameState.dataCount += len + 1;
		} else if ( cmd == svc_baseline ) {
			newnum = MSG_ReadBits( msg, GENTITYNUM_BITS );
			if ( newnum < 0 || newnum >= MAX_GENTITIES ) {
				Com_Error( ERR_DROP, "Baseline number out of range: %i", newnum );
			}
			Com_Memset (&nullstate, 0, sizeof(nullstate));
			es = &cl.entityBaselines[ newnum ];
			MSG_ReadDeltaEntity( msg, &nullstate, es, newnum );
		} else {
			Com_Error( ERR_DROP, "CL_ParseGamestate: bad command byte" );
		}
	}

	clc.clientNum = MSG_ReadLong(msg);
	// read the checksum feed
	clc.checksumFeed = MSG_ReadLong( msg );

#if defined(USE_CURL)
	// Parse values for cURL downloads
	CL_ParseServerInfo();
#endif

	// parse serverId and other cvars
	CL_SystemInfoChanged();

	// reinitialize the filesystem if the game directory has changed
	FS_ConditionalRestart( clc.checksumFeed );

	// This used to call CL_StartHunkUsers, but now we enter the download state before loading the cgame
	CL_InitDownloads();

	// make sure the game starts
	Cvar_Set( "cl_paused", "0" );
}

const void *R_MME_CaptureShotCmd( const void *data ) {
	const captureCommand_t *cmd = (const captureCommand_t *)data;

	if (!cmd->name[0])
		return (const void *)(cmd + 1);

	shotData.take = qtrue;
	shotData.fps = cmd->fps;
	shotData.dofFocus = cmd->focus;
	shotData.dofRadius = cmd->radius;
	if (strcmp( cmd->name, shotData.main.name) || mme_screenShotFormat->modified || mme_screenShotAlpha->modified ) {
		/* Also reset the the other data */
		blurData.control.totalIndex = 0;
		if ( workAlign )
			Com_Memset( workAlign, 0, workUsed );
		Com_sprintf( shotData.main.name, sizeof( shotData.main.name ), "%s", cmd->name );
		Com_sprintf( shotData.depth.name, sizeof( shotData.depth.name ), "%s.depth", cmd->name );
		Com_sprintf( shotData.stencil.name, sizeof( shotData.stencil.name ), "%s.stencil", cmd->name );
		
		mme_screenShotFormat->modified = qfalse;
		mme_screenShotAlpha->modified = qfalse;

		if (!Q_stricmp(mme_screenShotFormat->string, "jpg")) {
			shotData.main.format = mmeShotFormatJPG;
		} else if (!Q_stricmp(mme_screenShotFormat->string, "tga")) {
			shotData.main.format = mmeShotFormatTGA;
		} else if (!Q_stricmp(mme_screenShotFormat->string, "png")) {
			shotData.main.format = mmeShotFormatPNG;
		} else if (!Q_stricmp(mme_screenShotFormat->string, "avi")) {
			shotData.main.format = mmeShotFormatAVI;
        } else if (!Q_stricmp(mme_screenShotFormat->string, "pipe")) {
            shotData.main.format = mmeShotFormatPIPE;
		} else {
			shotData.main.format = mmeShotFormatTGA;
		}
		
		//grayscale works fine only with compressed avi :(
		if ((shotData.main.format != mmeShotFormatAVI && shotData.main.format != mmeShotFormatPIPE) || !mme_aviFormat->integer) {
			shotData.depth.format = mmeShotFormatPNG;
			shotData.stencil.format = mmeShotFormatPNG;
		} else if (shotData.main.format == mmeShotFormatAVI) {
			shotData.depth.format = mmeShotFormatAVI;
			shotData.stencil.format = mmeShotFormatAVI;
		} else if (shotData.main.format == mmeShotFormatPIPE) {
			shotData.depth.format = mmeShotFormatPIPE;
			shotData.stencil.format = mmeShotFormatPIPE;
		}

		if ((shotData.main.format == mmeShotFormatAVI && !mme_aviFormat->integer) || shotData.main.format == mmeShotFormatPIPE) {
			shotData.main.type = mmeShotTypeBGR;
		} else {
			shotData.main.type = mmeShotTypeRGB;
		}
		if ( mme_screenShotAlpha->integer ) {
			if ( shotData.main.format == mmeShotFormatPNG )
				shotData.main.type = mmeShotTypeRGBA;
			else if ( shotData.main.format == mmeShotFormatTGA )
				shotData.main.type = mmeShotTypeRGBA;
		}
		shotData.main.counter = -1;
		shotData.depth.type = mmeShotTypeGray;
		shotData.depth.counter = -1;
		shotData.stencil.type = mmeShotTypeGray;
		shotData.stencil.counter = -1;	
	}
	return (const void *)(cmd + 1);	
}

/*
==================
RB_TakeVideoFrameCmd
==================
*/
const void *RB_TakeVideoFrameCmd( const void *data )
{
	const videoFrameCommand_t	*cmd;
	byte				*cBuf;
	size_t				memcount, linelen;
	int				padwidth, avipadwidth, padlen, avipadlen;
	GLint packAlign;
	
	cmd = (const videoFrameCommand_t *)data;
	
	qglGetIntegerv(GL_PACK_ALIGNMENT, &packAlign);

	linelen = cmd->width * 3;

	// Alignment stuff for glReadPixels
	padwidth = PAD(linelen, packAlign);
	padlen = padwidth - linelen;
	// AVI line padding
	avipadwidth = PAD(linelen, AVI_LINE_PADDING);
	avipadlen = avipadwidth - linelen;

	cBuf = PADP(cmd->captureBuffer, packAlign);
		
	qglReadPixels(0, 0, cmd->width, cmd->height, GL_RGB,
		GL_UNSIGNED_BYTE, cBuf);

	memcount = padwidth * cmd->height;

	// gamma correct
	if(glConfig.deviceSupportsGamma)
		R_GammaCorrect(cBuf, memcount);

	if(cmd->motionJpeg)
	{
		memcount = RE_SaveJPGToBuffer(cmd->encodeBuffer, linelen * cmd->height,
			r_aviMotionJpegQuality->integer,
			cmd->width, cmd->height, cBuf, padlen);
		ri.CL_WriteAVIVideoFrame(cmd->encodeBuffer, memcount);
	}
	else
	{
		byte *lineend, *memend;
		byte *srcptr, *destptr;
	
		srcptr = cBuf;
		destptr = cmd->encodeBuffer;
		memend = srcptr + memcount;
		
		// swap R and B and remove line paddings
		while(srcptr < memend)
		{
			lineend = srcptr + linelen;
			while(srcptr < lineend)
			{
				*destptr++ = srcptr[2];
				*destptr++ = srcptr[1];
				*destptr++ = srcptr[0];
				srcptr += 3;
			}
			
			Com_Memset(destptr, '\0', avipadlen);
			destptr += avipadlen;
			
			srcptr += padlen;
		}
		
		ri.CL_WriteAVIVideoFrame(cmd->encodeBuffer, avipadwidth * cmd->height);
	}

	return (const void *)(cmd + 1);	
}

/*
=================
SV_CheckDRDoS

DRDoS stands for "Distributed Reflected Denial of Service".
See here: http://www.lemuria.org/security/application-drdos.html

Returns qfalse if we're good.  qtrue return value means we need to block.
If the address isn't NA_IP, it's automatically denied.
=================
*/
qboolean SV_CheckDRDoS(netadr_t from)
{
	netadr_t	exactFrom;
	int		i;
	floodBan_t	*ban;
	int		oldestBan;
	int		oldestBanTime;
	int		globalCount;
	int		specificCount;
	receipt_t	*receipt;
	int		oldest;
	int		oldestTime;
	static int	lastGlobalLogTime = 0;

	// Usually the network is smart enough to not allow incoming UDP packets
	// with a source address being a spoofed LAN address.  Even if that's not
	// the case, sending packets to other hosts in the LAN is not a big deal.
	// NA_LOOPBACK qualifies as a LAN address.
	if (Sys_IsLANAddress(from)) { return qfalse; }

	exactFrom = from;
	if (from.type == NA_IP) {
		from.ip[3] = 0; // xx.xx.xx.0
	}
	else {
		// So we got a connectionless packet but it's not IPv4, so
		// what is it?  I don't care, it doesn't matter, we'll just block it.
		// This probably won't even happen.
		return qtrue;
	}

	// This quick exit strategy while we're being bombarded by getinfo/getstatus requests
	// directed at a specific IP address doesn't really impact server performance.
	// The code below does its duty very quickly if we're handling a flood packet.
	ban = &svs.infoFloodBans[0];
	oldestBan = 0;
	oldestBanTime = 0x7fffffff;
	for (i = 0; i < MAX_INFO_FLOOD_BANS; i++, ban++) {
		if (svs.time - ban->time < 120000 && // Two minute ban.
				NET_CompareBaseAdr(from, ban->adr)) {
			ban->count++;
			if (!ban->flood && ((svs.time - ban->time) >= 3000) && ban->count <= 5) {
				Com_DPrintf("Unban info flood protect for address %s, they're not flooding\n",
						NET_AdrToString(exactFrom));
				Com_Memset(ban, 0, sizeof(floodBan_t));
				oldestBan = i;
				break;
			}
			if (ban->count >= 180) {
				Com_DPrintf("Renewing info flood ban for address %s, received %i getinfo/getstatus requests in %i milliseconds\n",
						NET_AdrToString(exactFrom), ban->count, svs.time - ban->time);
				ban->time = svs.time;
				ban->count = 0;
				ban->flood = qtrue;
			}
			return qtrue;
		}
		if (ban->time < oldestBanTime) {
			oldestBanTime = ban->time;
			oldestBan = i;
		}
	}

	// Count receipts in last 2 seconds.
	globalCount = 0;
	specificCount = 0;
	receipt = &svs.infoReceipts[0];
	oldest = 0;
	oldestTime = 0x7fffffff;
	for (i = 0; i < MAX_INFO_RECEIPTS; i++, receipt++) {
		if (receipt->time + 2000 > svs.time) {
			if (receipt->time) {
				// When the server starts, all receipt times are at zero.  Furthermore,
				// svs.time is close to zero.  We check that the receipt time is already
				// set so that during the first two seconds after server starts, queries
				// from the master servers don't get ignored.  As a consequence a potentially
				// unlimited number of getinfo+getstatus responses may be sent during the
				// first frame of a server's life.
				globalCount++;
			}
			if (NET_CompareBaseAdr(from, receipt->adr)) {
				specificCount++;
			}
		}
		if (receipt->time < oldestTime) {
			oldestTime = receipt->time;
			oldest = i;
		}
	}
//.........这里部分代码省略.........

/*
===============
GLimp_SetMode
===============
*/
static rserr_t GLimp_SetMode(int mode, qboolean fullscreen, qboolean noborder)
{
	const char *glstring;
	int perChannelColorBits;
	int colorBits, depthBits, stencilBits;
	//int samples;
	int i = 0;
	Uint32 flags = SDL_WINDOW_SHOWN | SDL_WINDOW_OPENGL;
	SDL_DisplayMode desktopMode;
	int display = 0;
	int x = SDL_WINDOWPOS_UNDEFINED, y = SDL_WINDOWPOS_UNDEFINED;

	Com_Printf( "Initializing OpenGL display\n");

	if ( r_allowResize->integer && !fullscreen )
		flags |= SDL_WINDOW_RESIZABLE;

	// If a window exists, note its display index
	if( screen != NULL )
		display = SDL_GetWindowDisplayIndex( screen );

	if( SDL_GetDesktopDisplayMode( display, &desktopMode ) == 0 )
	{
		displayAspect = (float)desktopMode.w / (float)desktopMode.h;

		Com_Printf( "Display aspect: %.3f\n", displayAspect );
	}
	else
	{
		Com_Memset( &desktopMode, 0, sizeof( SDL_DisplayMode ) );

		Com_Printf( "Cannot determine display aspect, assuming 1.333\n" );
	}

	Com_Printf( "...setting mode %d:", mode );

	if (mode == -2)
	{
		// use desktop video resolution
		if( desktopMode.h > 0 )
		{
			glConfig.vidWidth = desktopMode.w;
			glConfig.vidHeight = desktopMode.h;
		}
		else
		{
			glConfig.vidWidth = 640;
			glConfig.vidHeight = 480;
			Com_Printf( "Cannot determine display resolution, assuming 640x480\n" );
		}

		//glConfig.windowAspect = (float)glConfig.vidWidth / (float)glConfig.vidHeight;
	}
	else if ( !R_GetModeInfo( &glConfig.vidWidth, &glConfig.vidHeight, /*&glConfig.windowAspect,*/ mode ) )
	{
		Com_Printf( " invalid mode\n" );
		return RSERR_INVALID_MODE;
	}
	Com_Printf( " %d %d\n", glConfig.vidWidth, glConfig.vidHeight);

	// Center window
	if( r_centerWindow->integer && !fullscreen )
	{
		x = ( desktopMode.w / 2 ) - ( glConfig.vidWidth / 2 );
		y = ( desktopMode.h / 2 ) - ( glConfig.vidHeight / 2 );
	}

	// Destroy existing state if it exists
	if( opengl_context != NULL )
	{
		SDL_GL_DeleteContext( opengl_context );
		opengl_context = NULL;
	}

	if( screen != NULL )
	{
		SDL_GetWindowPosition( screen, &x, &y );
		ri->Printf( PRINT_DEVELOPER, "Existing window at %dx%d before being destroyed\n", x, y );
		SDL_DestroyWindow( screen );
		screen = NULL;
	}

	if( fullscreen )
	{
		flags |= SDL_WINDOW_FULLSCREEN;
		glConfig.isFullscreen = qtrue;
	}
	else
	{
		if( noborder )
			flags |= SDL_WINDOW_BORDERLESS;

		glConfig.isFullscreen = qfalse;
	}

//.........这里部分代码省略.........

//.........这里部分代码省略.........

		for (j = 0, tri = surf->triangles; j < surf->numTriangles; j++, tri++)
		{
			skelTriangle_t *sortTri = Com_Allocate(sizeof(*sortTri));

			for (k = 0; k < 3; k++)
			{
				sortTri->indexes[k]  = tri->indexes[k];
				sortTri->vertexes[k] = &surf->verts[tri->indexes[k]];
			}

			sortTri->referenced = qfalse;

			Com_AddToGrowList(&sortedTriangles, sortTri);
		}

		//qsort(sortedTriangles.elements, sortedTriangles.currentElements, sizeof(void *), CompareTrianglesByBoneReferences);

#if 0
		for (j = 0; j < sortedTriangles.currentElements; j++)
		{
			int b[MAX_WEIGHTS * 3];

			skelTriangle_t *sortTri = Com_GrowListElement(&sortedTriangles, j);

			for (k = 0; k < 3; k++)
			{
				v = sortTri->vertexes[k];

				for (l = 0; l < MAX_WEIGHTS; l++)
				{
					b[k * 3 + l] = (l < v->numWeights) ? v->weights[l]->boneIndex : 9999;
				}

				qsort(b, MAX_WEIGHTS * 3, sizeof(int), CompareBoneIndices);
				//Ren_Print("bone indices: %i %i %i %i\n", b[k * 3 + 0], b[k * 3 + 1], b[k * 3 + 2], b[k * 3 + 3]);
			}
		}
#endif

		numRemaining = sortedTriangles.currentElements;

		while (numRemaining)
		{
			numBoneReferences = 0;
			Com_Memset(boneReferences, 0, sizeof(boneReferences));

			Com_InitGrowList(&vboTriangles, 1000);

			for (j = 0; j < sortedTriangles.currentElements; j++)
			{
				skelTriangle_t *sortTri = Com_GrowListElement(&sortedTriangles, j);

				if (sortTri->referenced)
				{
					continue;
				}

				if (AddTriangleToVBOTriangleList(&vboTriangles, sortTri, &numBoneReferences, boneReferences))
				{
					sortTri->referenced = qtrue;
				}
			}

			if (!vboTriangles.currentElements)
			{
				Ren_Warning("R_LoadMD5: could not add triangles to a remaining VBO surfaces for model '%s'\n", modName);
				Com_DestroyGrowList(&vboTriangles);
				break;
			}

			AddSurfaceToVBOSurfacesList(&vboSurfaces, &vboTriangles, md5, surf, i, numBoneReferences, boneReferences);
			numRemaining -= vboTriangles.currentElements;

			Com_DestroyGrowList(&vboTriangles);
		}

		for (j = 0; j < sortedTriangles.currentElements; j++)
		{
			skelTriangle_t *sortTri = Com_GrowListElement(&sortedTriangles, j);

			Com_Dealloc(sortTri);
		}

		Com_DestroyGrowList(&sortedTriangles);
	}

	// move VBO surfaces list to hunk
	md5->numVBOSurfaces = vboSurfaces.currentElements;
	md5->vboSurfaces    = ri.Hunk_Alloc(md5->numVBOSurfaces * sizeof(*md5->vboSurfaces), h_low);

	for (i = 0; i < md5->numVBOSurfaces; i++)
	{
		md5->vboSurfaces[i] = ( srfVBOMD5Mesh_t * ) Com_GrowListElement(&vboSurfaces, i);
	}

	Com_DestroyGrowList(&vboSurfaces);

	return qtrue;
}

/*
===============
R_Init
===============
*/
void R_Init( void ) {	
	int	err;
	int i;
	byte *ptr;

	ri.Printf( PRINT_ALL, "----- R_Init -----\n" );

	// clear all our internal state
	Com_Memset( &tr, 0, sizeof( tr ) );
	Com_Memset( &backEnd, 0, sizeof( backEnd ) );
	Com_Memset( &tess, 0, sizeof( tess ) );

//	Swap_Init();

	if ( (intptr_t)tess.xyz & 15 ) {
		Com_Printf( "WARNING: tess.xyz not 16 byte aligned\n" );
	}
	Com_Memset( tess.constantColor255, 255, sizeof( tess.constantColor255 ) );

	//
	// init function tables
	//
	for ( i = 0; i < FUNCTABLE_SIZE; i++ )
	{
		tr.sinTable[i]		= sin( DEG2RAD( i * 360.0f / ( ( float ) ( FUNCTABLE_SIZE - 1 ) ) ) );
		tr.squareTable[i]	= ( i < FUNCTABLE_SIZE/2 ) ? 1.0f : -1.0f;
		tr.sawToothTable[i] = (float)i / FUNCTABLE_SIZE;
		tr.inverseSawToothTable[i] = 1.0f - tr.sawToothTable[i];

		if ( i < FUNCTABLE_SIZE / 2 )
		{
			if ( i < FUNCTABLE_SIZE / 4 )
			{
				tr.triangleTable[i] = ( float ) i / ( FUNCTABLE_SIZE / 4 );
			}
			else
			{
				tr.triangleTable[i] = 1.0f - tr.triangleTable[i-FUNCTABLE_SIZE / 4];
			}
		}
		else
		{
			tr.triangleTable[i] = -tr.triangleTable[i-FUNCTABLE_SIZE/2];
		}
	}

	R_InitFogTable();

	R_NoiseInit();

	R_Register();

	max_polys = r_maxpolys->integer;
	if (max_polys < MAX_POLYS)
		max_polys = MAX_POLYS;

	max_polyverts = r_maxpolyverts->integer;
	if (max_polyverts < MAX_POLYVERTS)
		max_polyverts = MAX_POLYVERTS;

	ptr = ri.Hunk_Alloc( sizeof( *backEndData[0] ) + sizeof(srfPoly_t) * max_polys + sizeof(polyVert_t) * max_polyverts, h_low);
	backEndData[0] = (backEndData_t *) ptr;
	backEndData[0]->polys = (srfPoly_t *) ((char *) ptr + sizeof( *backEndData[0] ));
	backEndData[0]->polyVerts = (polyVert_t *) ((char *) ptr + sizeof( *backEndData[0] ) + sizeof(srfPoly_t) * max_polys);
	if ( r_smp->integer ) {
		ptr = ri.Hunk_Alloc( sizeof( *backEndData[1] ) + sizeof(srfPoly_t) * max_polys + sizeof(polyVert_t) * max_polyverts, h_low);
		backEndData[1] = (backEndData_t *) ptr;
		backEndData[1]->polys = (srfPoly_t *) ((char *) ptr + sizeof( *backEndData[1] ));
		backEndData[1]->polyVerts = (polyVert_t *) ((char *) ptr + sizeof( *backEndData[1] ) + sizeof(srfPoly_t) * max_polys);
	} else {
		backEndData[1] = NULL;
	}
	R_ToggleSmpFrame();

	InitOpenGL();

	R_InitImages();

	R_InitShaders();

	R_InitSkins();

	R_ModelInit();

	R_InitFreeType();


	err = qglGetError();
	if ( err != GL_NO_ERROR )
		ri.Printf (PRINT_ALL, "glGetError() = 0x%x\n", err);

	ri.Printf( PRINT_ALL, "----- finished R_Init -----\n" );
}

/*
==================
CL_ParseGamestate
==================
*/
void CL_ParseGamestate( msg_t *msg ) {
	int				i;
	entityState_t	*es;
	int				newnum;
	entityState_t	nullstate;
	int				cmd;
	char			*s;

	Con_Close();

	clc.connectPacketCount = 0;

	// wipe local client state
	CL_ClearState();

#ifdef _DONETPROFILE_
	int startBytes,endBytes;
	startBytes=msg->readcount;
#endif

	// a gamestate always marks a server command sequence
	clc.serverCommandSequence = MSG_ReadLong( msg );

	// parse all the configstrings and baselines
	cl.gameState.dataCount = 1;	// leave a 0 at the beginning for uninitialized configstrings
	while ( 1 ) {
		cmd = MSG_ReadByte( msg );

		if ( cmd == svc_EOF ) {
			break;
		}
		
		if ( cmd == svc_configstring ) {
			int		len, start;

			start = msg->readcount;

			i = MSG_ReadShort( msg );
			if ( i < 0 || i >= MAX_CONFIGSTRINGS ) {
				Com_Error( ERR_DROP, "configstring > MAX_CONFIGSTRINGS" );
			}
			s = MSG_ReadBigString( msg );

			if (cl_shownet->integer >= 2)
			{
				Com_Printf("%3i: %d: %s\n", start, i, s);
			}

			/*
			if (i == CS_SERVERINFO)
			{ //get the special value here
				char *f = strstr(s, "g_debugMelee");
				if (f)
				{
					while (*f && *f != '\\')
					{ //find the \ after it
						f++;
					}
					if (*f == '\\')
					{ //got it
						int i = 0;

						f++;
						while (*f && *f != '\\' && i < 128)
						{
							hiddenCvarVal[i] = *f;
							i++;
							f++;
						}
						hiddenCvarVal[i] = 0;

						//resume here
						s = f;
					}
				}
			}
			*/

			len = strlen( s );

			if ( len + 1 + cl.gameState.dataCount > MAX_GAMESTATE_CHARS ) {
				Com_Error( ERR_DROP, "MAX_GAMESTATE_CHARS exceeded" );
			}

			// append it to the gameState string buffer
			cl.gameState.stringOffsets[ i ] = cl.gameState.dataCount;
			Com_Memcpy( cl.gameState.stringData + cl.gameState.dataCount, s, len + 1 );
			cl.gameState.dataCount += len + 1;
		} else if ( cmd == svc_baseline ) {
			newnum = MSG_ReadBits( msg, GENTITYNUM_BITS );
			if ( newnum < 0 || newnum >= MAX_GENTITIES ) {
				Com_Error( ERR_DROP, "Baseline number out of range: %i", newnum );
			}
			Com_Memset (&nullstate, 0, sizeof(nullstate));
			es = &cl.entityBaselines[ newnum ];
//.........这里部分代码省略.........

//.........这里部分代码省略.........
		for ( i = 0 ; i < ( sizeof( vmHeader_t ) - sizeof( int ) ) / 4 ; i++ ) {
			((int *)header.h)[i] = LittleLong( ((int *)header.h)[i] );
		}

		// validate
		if ( header.h->bssLength < 0
			|| header.h->dataLength < 0
			|| header.h->litLength < 0
			|| header.h->codeLength <= 0 )
		{
			VM_Free(vm);
			FS_FreeFile(header.v);

			Com_Printf(S_COLOR_YELLOW "Warning: %s has bad header\n", filename);
			return NULL;
		}
	} else {
		VM_Free( vm );
		FS_FreeFile(header.v);

		Com_Printf(S_COLOR_YELLOW "Warning: %s does not have a recognisable "
				"magic number in its header\n", filename);
		return NULL;
	}

	// round up to next power of 2 so all data operations can
	// be mask protected
	dataLength = header.h->dataLength + header.h->litLength +
		header.h->bssLength;
	for ( i = 0 ; dataLength > ( 1 << i ) ; i++ ) {
	}
	dataLength = 1 << i;

	if(alloc)
	{
		// allocate zero filled space for initialized and uninitialized data
		vm->dataBase = Hunk_Alloc(dataLength, h_high);
		vm->dataMask = dataLength - 1;
	}
	else
	{
		// clear the data, but make sure we're not clearing more than allocated
		if(vm->dataMask + 1 != dataLength)
		{
			VM_Free(vm);
			FS_FreeFile(header.v);

			Com_Printf(S_COLOR_YELLOW "Warning: Data region size of %s not matching after "
					"VM_Restart()\n", filename);
			return NULL;
		}
		
		Com_Memset(vm->dataBase, 0, dataLength);
	}

	// copy the intialized data
	Com_Memcpy( vm->dataBase, (byte *)header.h + header.h->dataOffset,
		header.h->dataLength + header.h->litLength );

	// byte swap the longs
	for ( i = 0 ; i < header.h->dataLength ; i += 4 ) {
		*(int *)(vm->dataBase + i) = LittleLong( *(int *)(vm->dataBase + i ) );
	}

	if(header.h->vmMagic == VM_MAGIC_VER2)
	{
		int previousNumJumpTableTargets = vm->numJumpTableTargets;

		header.h->jtrgLength &= ~0x03;

		vm->numJumpTableTargets = header.h->jtrgLength >> 2;
		Com_Printf("Loading %d jump table targets\n", vm->numJumpTableTargets);

		if(alloc)
		{
			vm->jumpTableTargets = Hunk_Alloc(header.h->jtrgLength, h_high);
		}
		else
		{
			if(vm->numJumpTableTargets != previousNumJumpTableTargets)
			{
				VM_Free(vm);
				FS_FreeFile(header.v);

				Com_Printf(S_COLOR_YELLOW "Warning: Jump table size of %s not matching after "
						"VM_Restart()\n", filename);
				return NULL;
			}

			Com_Memset(vm->jumpTableTargets, 0, header.h->jtrgLength);
		}

		Com_Memcpy(vm->jumpTableTargets, (byte *) header.h + header.h->dataOffset +
				header.h->dataLength + header.h->litLength, header.h->jtrgLength);

		// byte swap the longs
		for ( i = 0 ; i < header.h->jtrgLength ; i += 4 ) {
			*(int *)(vm->jumpTableTargets + i) = LittleLong( *(int *)(vm->jumpTableTargets + i ) );
		}
	}

/*
==============
Sys_ClearExecBuffer
==============
*/
static void Sys_ClearExecBuffer( void )
{
	execBufferPointer = execBuffer;
	Com_Memset( execArgv, 0, sizeof( execArgv ) );
	execArgc = 0;
}